Tham khảo tài liệu 'plastics engineered product design part 10', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | 340 Plastics Engineered Product Design Vehicle Oil Pan The oil pan is a critical component in auto and truck applications because any failure would be catastrophic. It must withstand high temperature and impact keep the bolt torque intact for good sealing resist vibration and abuse especially during assembly and in many instances functions as a structural member. The pan is divided into basic elements and analyzed as follows 1 sides are considered to be flat plates uniformly loaded with rigid supports. 2 flanges are analyzed as beams on elastic foundations because of the gasket metal interfacing and 3 bottom section is considered as a plate but needs to withstand high impact loads dynamic loading . After the bolt torque is established the washer size must be determined by computation based upon compressive and shear stresses and flange deflection. The flange thickness will also be determined from calculations. After it has been established that these values are safe the remaining sections such as the sides and bottom can now be designed for thickness and shape based on the values of the static and or dynamic loads impact supplied as part of the input data. If some elements show either high stress or excessive deflection 1 elongation in the elastic range ribs or gussets can be added and or the wall thickness increased in selective areas only. History has shown that theoretical analysis yields a design very close to the final manufactured product and meets intended performance requirements dictated by laboratory as well as field testing. Attachment There will be cases where attachments become necessary. One of the most frequent types is threaded parts. In most instances these fasteners are used repeatedly to attach or remove components. To ensure that the reliability and the life of the frequently used joint are maximized a threaded insert is used rather than threading the plastic material. In this manner the wall thickness of the insert and plastic part is reduced .
